Are your muscles genetically prepared to run a marathon?
For a few years, running has been fashionable. But there is a great difference between the physical demands of running a few kilometers and doing a marathon. Now researchers have concluded that genetics plays an essential role in success when completing this long distance. Ref. Source 8k.
I do not run or very little. I can walk fast but not fast enough to "Run" a marathon. Can I walk 26 miles in a day? Maybe I would try it some day but do not expect me to finish any time soon *smile* Maybe if I try something like this I will start with a 10K or something to see how I do. Maybe I will just go climb a mountain.